"We are trying to get better life. Here also, in this life also, we are struggling hard for getting better position. So real better position we do not know. That is described in the Bhagavad-gita: sah amrtatvaya kalpate. Here in this material world there is no better position because there is death. You may possess a very good better position, but you'll have to give it up. Either the better position will give up you, or ultimately you have to give up that better position. You cannot stay. Suppose you have earned millions of dollars, millions of pounds: 'Now we have got good bank balance.' You think, 'Now I am in the better position.' A little dysentery, or cholera, dysentery -- finished, better position. Or the bank fails -- that better position gone. So there is no better position in this material world. It is a false. Therefore those who are trying to get better position in this material world, they are simply becoming defeated, because there is no better position. He's a rascal. He's thinking this is better position. What is better position? Then Bhagavad-gita says the better position is amrtatva. Sah amrtatvaya kalpate: 'Don't die. Keep your position firm.' That is better position. So is there any science to give knowledge how one becomes immortal? Yes, there is. You can become immortal. Not in this material science; not in the so-called universities. But there is knowledge in the Vedic scripture by which you can become immortal. That is better position. No more death, no more birth, no more old age, no more disease. So guru's task is very great responsibility. He has to guide the disciple how to make him quite eligible candidate to get the perfect position, immortality, back to home, back to Godhead."
(Srila Prabhupada lecture, London, August 22, 1973)